Curvilinear zipper



FIG. 1 is a perspective view of a curvilinear zipper in a position of use in its environment and taken from the side;

FIG. 2 is a front view of the curvilinear zipper of FIG. 1; and,

FIG. 3 is a right side view of the curvilinear zipper of FIG. 1.

The broken lines showing are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a curvilinear zipper, as shown and described. 